Sales Tax Calculator
Calculate tax amount and total price using a tax rate you enter.
Enter your details
Your result
Tax amount
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Total including tax
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Enter your assumptions to see a short result summary.
How it works
- The tax rate is entered directly by the user.
- Tax amount equals the pre-tax amount multiplied by the entered tax rate.
- Total price equals the pre-tax amount plus the calculated tax.
Sales Tax = Pre-tax Amount × Tax Rate
Total = Pre-tax Amount + Sales Tax
Frequently asked questions
Does the calculator know my local tax rate?
No. Tax rules vary by location and product. Enter the rate that applies to your situation.
Can the tax rate be zero?
Yes. A zero rate produces no additional tax.
Does this calculate VAT or GST rules?
It only applies a user-entered percentage to the pre-tax amount and does not determine jurisdiction-specific tax treatment.
Disclaimer
This tool performs a simple percentage calculation and does not determine whether a transaction is taxable or which tax rate applies. Tax rules vary by jurisdiction, product, service, exemption, and transaction type.